Improved scaffold



0. -D. ADAMS.

Scaffold.

No. 60,659. Patented'Jan. 1, 1867 a, PETERS, FHOTO-LITHOGRAPHER. WASHINGWN. 11 c.

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D. D. ADAMS, OF BROOKLINE, MASSACHUSETTS.

Letters Patent No. 60,659, dated-January 1, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, D. D. ADAMS, of Broohline, in the county of Norfolk, and State of Massachusetts, have invented a new and useful Improvement in Scaffold; and I do hereby declare that the following is a full,

clear, and exact description thereof, which will enable others skilled in the art to make and use thesame, reference beinghad to the accompanying drawings, forming part of this specification, in which Figure 1 is an end view of my improved scaii'old, partly in section through the line a: 9:, fig. 2.

Figure 2 is a top view of the same.

Figure 3 is a detail sectional view, taken through the line y 3/, fig. 5.

Figure 4 is an edge view of one-half the scaffold folded for transportation.

Figure 5 is a top or side view of the same.

Similar letters of reference indicate like parts.

My invention has for its object to furnish an improved scaffold, for use in repairing the tops of chimneys, simple in construction, easily raised, lowered, or adjusted upon a chimney, and which can be closely packed for storage or transportation, and it consists, first, .in the scaffold formed by combining the front, central, and back rails, the side bars, the pawls, corner blocks, and connecting-rods with eachother; second, in the combination of lower braces and hang bars with the scaffold; the, whole being constructed and arranged as hereinafter more fully described. v

A is the central rail of the main frame of the scaffold. This rail is securely attached at its ends to the side bars B of the'frame, as shown in fig. 2. To the lower ends of the said side bars, B, are attached the front rails C, in a slightly inclined position, so that when the scafi'old is applied to a chimney, the said rails C will be about horizontal, as shown in fig. 1. The upper-sides of the rails 0, near their front edges, are grooved, as shown in figs. 1, 2, and 3, for the purpose hereinafter mentioned. The back rails D, are longer than the other parts of the scaffold, as shown in the drawings, and they are secured to the ends of the side bars B, by spikes or bolts. passing through the said rails D, and into holes in the ends of the said bars 13, so as to .be readily removed when required. E are the corner blocks, which are made with a flange so as to fit upon the corners of the chimney, as shown in figs. 1 and 2, and are of such adength as to\reach across five or six courses of bricks. This brings the pressure of the scaffold upon the corners or strongest parts of the chimney. Across the rear side of the corner blocks, E, is formed a dove-tailed groove which fits upon the grooved front edges of the rails C, so that the blocks E may be adjusted according to the size of the chimney. W'hen adjusted upon the chimney the blocks E may be secured in place by pins, 0 passing through holes formed.in the projecting ends of small metallic bands, 0'', secured in the bottoms of the dove-tailed grooves, and into holes formed in the forward edge of the front rails C, as seen in fig. 4. When packed for storage or transportation, the blocks E are placed upon the underside of the rails 0, between the side bars B and the grooved slats F, where they are secured in place by the pins 0, as shown in figs. 4 and 5. G are strengthening braces extending from the rail 0 to the rail A, to strengthen and stiffen the main frame. H are the pawls, which are hinged to the central bar, A, of the main frame of the scaffold, as shown in the drawings, so that they may be swung back for convenience in raising the scaffold. The front rail H of the pawls, which is attached to the forward ends of the arms or bars, h and h, has its front edge bevelled so as to fit against the side of the chimney when bracing the scaffold, as shown in. figs. 1 and 2, and the said front edge may also be notched as shown, to pass around a lightning-rod, should one be attached to the chimney. I are the connecting-rods which connect the two halves or parts of the scafi'old'to each other, through one or both the ends of which are formed numerous holes through which are passed the bolts by means of which the rods are attached to the side bars B, as shown. J is a turn buckle or swivel formed upon one of the connecting-rods I, by means of which the scaffold may be adjusted, should it be found, after the scaffold has been erected, that the corner blocks E do .not fit accurately upon the/chimney. When the scaffold is packed for transportation or storage, the rods I are laid upon the outer ends of the side barsB, beneath the back rails D, and are secured in place by the bolts which secure the said rails to their places, passing also through the rods I, as shown in fig. 3. K are the lower braces, the side bars, k, ofwhioh are pivoted at their upper ends to the side bars B of the main frame of the scaffold, as shown in figs. 1 and 2; it" are the front rails of the braces, the lower edge of which rests against the sides of the chimney. The said lower edge of the rails 79 is.bevelled so as to rest smoothly against the sides of the said chimney, and its central part is notched for the passage of the lightning-rod, should there he one. The braces K are kept from swinging away from the chimney, when not pressed against it, by the brace-hangers L, which are suspended from the front rail C of the scaffold by buttons Z adjustably attached to the said hangers, so that the lower rail of the brace can be lowered or raised, as occasion may require. In the lower ends of the hangers L are formed notches in which the lower edges of the braces K rest and are supported. In erecting the scafi'old the halves or parts are placed on each side of .the chimney, and the corner blocks E removed from their places and adjusted upon the edge of the forward rail C of the scaffold. The back rails D and rods I are then removed, and the rods I adjusted in place. The pawls H are then turned back, and the scaffold raised to the desired height, by two men, each of whom takes hold of a red, I, with one hand, and of the sides of the scaffold with the other, when, at the proper height,

the corner blocks are brought into contact with the chimney and the scaffold supports itself. The pawls H are then swung forward, and the rails D attached. By bearing down upon the outer edge of the scaffold, the pawls will drop down further and take a firmer hold upon the chimney. The braces K are then attached and the braceliangers L adjusted and applied. In case of low chimneys the braces K cannot be applied, nor are theyvneeded. But in the case of high or slender chimneys they should be used.

I claim as new, and desire to secure by Letters Patent 1. An improved scafi'old formed by combining the front rails C, the central rails A, the back rails D, the side bars B, the pawls H, the corner blocks E, and connecting-rods I, with each other, the various parts being constructed and arranged substantiallyas herein described and for the purpose set forth.

2. The combination of the' braces K, and brace-hangers L, constructed as described, with each other and with the side bars B, and front rails O, substantially as described and for the purpose set forth.

' v D. D. ADAMS.

Witnesses:

ALFRED KENRICK, In, WILLARD Y. Gnnss. 

